added helm to image

.drone.yml

@@ -6,8 +6,9 @@ pipeline:
     build_args:
       - BASE_IMAGE=google/cloud-sdk:${VERSION}
       - KUBECTL_VERSION=${KUBECTL_VERSION}
+      - HELM_VERSION=${HELM_VERSION}
     tags:
-     - ${VERSION}_kubectl-${KUBECTL_VERSION}
+     - ${VERSION}_kubectl-${KUBECTL_VERSION}_helm-${HELM_VERSION}
     secrets: [ docker_username, docker_password ]
     when:
       branch: master
@@ -19,3 +20,6 @@ matrix:
     - v1.9.10
     - v1.10.7
     - v1.11.2
+  HELM_VERSION:
+    - v2.10.0
+    - v2.9.1

Dockerfile

@@ -5,6 +5,12 @@ RUN apk add -U --no-cache openssl
 
 # download and install kubectl
 ARG KUBECTL_VERSION
-
 RUN curl -L https://storage.googleapis.com/kubernetes-release/release/$KUBECTL_VERSION/bin/linux/amd64/kubectl -o /usr/bin/kubectl \
 	&& chmod +x /usr/bin/kubectl
+
+ARG HELM_VERSION
+RUN curl -LO https://storage.googleapis.com/kubernetes-helm/helm-$HELM_VERSION-linux-amd64.tar.gz \
+  && tar xfvz helm-$HELM_VERSION-linux-amd64.tar.gz \
+	&& mv linux-amd64/helm /usr/bin/helm \
+	&& rm -rf linux-amd64 #\
+	&& rm helm-$HELM_VERSION-linux-amd64.tar.gz